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单词
elevator dredge
释义
elevator dredge
elevator dredge
[
′el·ə‚vād·ər ‚drej
]
(mechanical engineering)
A dredge which has a chain of buckets, usually flattened across the front and mounted on a nearly vertical ladder; used principally for excavation of sand and gravel beds under bodies of water.
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pyknic
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pyknic type
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pyknocyte
pyknocytosis
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pyknosis
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pyl
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pylades and orestes
pylaev, georgii
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更新时间:2025/3/4 8:01:07